December Birthstone Jewelry

December has three official birthstones — turquoise, tanzanite, and zircon — with blue topaz widely accepted as a fourth, modern option; all share the month’s blue signature. Tanzanite, the rarest, anchors this collection; turquoise is the traditional stone; blue zircon the brilliant historical alternate. How one month came to hold so many stones is the story our December birthstone guide tells in full.

Because the modern list kept growing. Turquoise held December in the original 1912 standardization; zircon was added as a faceted, brilliant alternative; and tanzanite joined in 2002, only decades after its 1967 discovery — the newest stone on the whole chart. Blue topaz entered by popular acceptance rather than committee. Each addition offered a different blue at a different price, and all remain official or accepted today.

Tanzanite — it is mined in a single deposit in the Merelani Hills of northern Tanzania and nowhere else on earth, a claim no other December stone can make. The deposit is finite, which is why gem traders describe tanzanite as a single-generation stone. Its meaning, grading, and buying advice are covered in our tanzanite meaning guide.

Yes, by broad modern acceptance — blue topaz appears on many contemporary December lists alongside the three official stones, and jewelers treat it as a legitimate choice for the month. Its practical appeal is durability: at Mohs 8 it is the hardest of December’s blues, well suited to daily rings. Our November birthstone collection shares the stone, since topaz officially anchors that month.

Blue, in four registers — turquoise’s opaque sky-blue, tanzanite’s deep blue-violet, blue zircon’s brilliant teal, and blue topaz’s clear sky-to-London range. Tanzanite is the most distinctive: trichroic, it shifts between blue and violet as the light changes, occasionally flashing burgundy. If the violet end of that range appeals, our purple gemstones guide maps every stone in the neighborhood.

With sensible settings, yes — tanzanite rates 6–7 on the Mohs scale, so daily-wear tanzanite rings do best in protective bezel or low-profile designs, removed for heavy work and harsh chemicals; necklaces and earrings wear it effortlessly. We state the hardness on every listing rather than selling around it. The full care routine by stone and metal is in our jewelry care guide.

Genuinely — tanzanite comes from one deposit near Mount Kilimanjaro, discovered in 1967, and no second source has ever been found. That single-origin scarcity, combined with a finite known supply, gives tanzanite a rarity story most accessibly priced gems cannot match. Lab-created tanzanite-color stones exist at lower prices; every listing here states exactly what you are buying, natural or created.

Yes — a tanzanite birthstone engagement ring is one of the most distinctive bridal choices on the calendar, provided the setting protects the stone: bezels, halos, and low-profile designs suit tanzanite’s Mohs 6–7 hardness, and hidden-halo styles add sparkle without exposure. Kite-cut, cushion, and Art Deco tanzanite sets appear throughout this page, and the custom ring service can armor any design further.

In small numbers, honestly — turquoise is the month’s traditional stone, but our December strength is tanzanite, and the turquoise selection is a handful of pieces at any time rather than a deep catalog. At Mohs 5–6, turquoise also prefers necklaces, earrings, and occasional-wear rings over daily bands. If turquoise is the stone you want, browse the dedicated collection linked above or ask us about a custom piece.

Everything but the name. Zircon is a natural mineral — zirconium silicate — prized for centuries, with blue zircon’s fire and brilliance approaching diamond’s; cubic zirconia is a cheap lab-made diamond simulant with no birthstone standing. The unfortunate similarity of names costs zircon its reputation unfairly. Our blue zircon guide makes the case for the real December stone.

It is the natural double gift — one stone that answers both occasions, in a winter blue-violet that reads seasonal without being themed. Pendants and stud earrings sidestep ring sizing entirely; ring sets suit bigger-milestone years. Complimentary engraving adds a date or initials, and our gift guide covers timing, presentation, and no-risk sizing options for surprise gifts.

Yes — most designs can be ordered in a different metal or stone size, and cross-month pairings (tanzanite with aquamarine, blue topaz with zircon) are a specialty of the custom ring service, which builds bespoke pieces with direct communication throughout. Complimentary engraving is available on most designs; confirm ring fit first with the free sizing guide.